Preston, the Vanisher Combos
Preston, the Vanisher + Karmic Guide + Clone
Ratchet, Field Medic // Ratchet, Rescue Racer + Preston, the Vanisher + Soul's Attendant
Ratchet, Field Medic // Ratchet, Rescue Racer + Preston, the Vanisher + Soul Warden
Ratchet, Field Medic // Ratchet, Rescue Racer + Preston, the Vanisher + Healer of the Pride
Ratchet, Field Medic // Ratchet, Rescue Racer + Preston, the Vanisher + Distinguished Conjurer
Ratchet, Field Medic // Ratchet, Rescue Racer + Preston, the Vanisher + Ajani's Welcome
Preston, the Vanisher + Ruthless Technomancer + Curse of Conformity
Combo result
Infinite Treasure tokens. Infinite colored mana. Infinite ETB. Infinite LTB. Infinite sacrifice triggers. Infinite death triggers. Return all creature cards from your graveyard to the battlefield. Infinite blinking of creatures and creature cards in your graveyard. Infinite creature tokens.
Prerequisites
Ephemerate in hand. All other permanents on the battlefield. Curse of Conformity attached to you. {W} available.